Inspection Procedure C-2

Door Lock Actuator Circuit:

CIRCUIT OPERATION
- The ETACS-ECU operates the door lock actuators through its dedicated relay (integrated in the ETACS-ECU).
- The ETACS-ECU drives the relay to lock or unlock the door if the requirements are satisfied.

TECHNICAL DESCRIPTION (COMMENT)
The door lock actuator, or the harness wire between ETACS-ECU and the door lock actuator may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the ETACS-ECU
- Malfunction of the driver's or passenger's door lock actuator
- Damaged harness wires or connectors

DIAGNOSIS
Required Special Tool:
MB991223: Harness Set

STEP 1. Check the door lock actuator operation.
Remove the defective door lock actuator to check. (Refer to Door - Door Handle and Latch.)
If the door lock actuator is defective, replace the door lock actuator.
All doors should be locked or unlocked.

Driver's Door Lock Actuator:

If the driver's door lock actuator is normal, go to Step 2.

Passenger's Door Lock Actuator:

If the passenger's door lock actuator is normal, go to Step 4.







STEP 2. Check the ETACS-ECU connector C-114 and driver's door lock actuator connector E-13 for damage.
If the ETACS-ECU connector C-114 and driver's door lock actuator connector E-13 are damaged, repair or replace them. Refer to Harness Connector Inspection.
All doors should be locked or unlocked.

If the connectors are in good condition, go to Step 3.













STEP 3. Check the harness wires between ETACS-ECU connector C-114 and driver's door lock actuator connector E-13.

NOTE: After checking junction block connectors C-104 and C-107 and intermediate connector C-91, check the wires. If junction block connectors C-104 and C-107 and intermediate connector C-91 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between ETACS-ECU connector C-114 and driver's door lock actuator connector E-13 are damaged, repair them.
All doors should be locked or unlocked.

If the harness wires are in good condition, replace the ETACS-ECU.
All doors should be locked or unlocked.







STEP 4. Check the ETACS-ECU connector C-114 and passenger's door lock actuator connector E-07 for damage.
If the ETACS-ECU connector C-114 and passenger's door lock actuator connector E-07 are damaged, repair or replace them. Refer to Harness Connector Inspection.
All doors should be locked or unlocked.

If the connectors are in good condition, go to Step 5.













STEP 5. Check the harness wires between ETACS-ECU connector C-li 4 and passenger's door lock actuator connector E-07.

NOTE: After checking junction block connector C-104 and intermediate connector C-19, check the wires. If junction block connector C-104 and intermediate connector C-19 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between ETACS-ECU connector C-114 and passenger's door lock actuator connector E-07 are damaged, repair them.
All doors should be locked or unlocked.

If the harness wires are in good condition, replace the ETACS-ECU.
All doors should be locked or unlocked.